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| 基金项目： |
| 缪晓图 |
| 江苏省地质调查研究院 江苏南京210049 |
| 摘要： |
| 基于水、土应力平衡观点，获得了对Ⅱ承压水过量开采发生地面沉降和可开采资源的认识，但平衡条件尚有模糊性，认为承压水一开采就产生水、土应力失衡。其分析研究在含水层弹性释放量上，未分天然状态土体自重压缩和开采至水、土应力失衡互动时含水层压缩弹性释放量，这就导致水、土应力平衡条件认识上的模糊性。通过土体压缩曲线与地面沉降发生曲线变化特征，结合苏州市城市规划区东部郭巷Ⅱ承压水开采过程中水位与地面沉降同步监测资料研究，论述苏锡常地区Ⅱ承压水具高压强，有一个天然动态下水、土应力平衡面，Ⅱ承压水开采其顶板以上土体不同厚度区，按天然状态水、土应力平衡面以上水压力控制开采，不会发生地面沉降。这一问题的深化有助于地面沉降机理研究和承压水可开采资源评价及开采利用条件的认识，为超采区划定和沿江及高水位地区由封井转入按水、土应力平衡开采提供了理论依据。 |
| 关键词：承压水开采 水土 应力平衡 Ⅱ承压水 江苏 |
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| Abstract: |
| Based on the equilibrium viewpoints on water and soil stress,the cognition is acquired about the land subsidence resulted by the excessive withdrawal of the second confined groundwater and the workable resources.The author thought once the confined water is withdrawal,the water and soil stress equilibrium will be lost.Based on the variation features of soil compressive curves and land subsidence curves,and in combination with a case study data on water level and land subsidence in east Suzhou City,the author stated that there existed a high intensity of pressure in the second confined water and a water and soil stress equilibrium plane under natural dynamic in SU-Xi-Chang region.It is concluded that a water pressure restraining extraction will not bring on land subsidence above the natural water and soil stress equilibrium.The conclusion helps to the study of land subsidence mechanism and appraisal of workable confined water as well as the cognition of exploitation conditions,providing a theoretical background for the delimitation of excessive extraction areas and transformation of sealing into the extraction based on water and soil stress equilibrium. |
| Keywords:Confined water extraction,Water and soil,Stress equilibrium,Second confined water,Jiangsu, |
| 缪晓图.苏锡常地区孔隙Ⅱ承压水开采条件与水、土应力平衡探讨[J].地质学刊,2004,28(4):233-237 |
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